Rhossili Bay - surf spot statistics

Rhossili Bay is a reliable surf spot in the UK, but conditions vary significantly throughout the year. The best months for surfing are typically from late autumn through winter, particularly from November to February, when ground swells dominate, averaging 1.2m to 1.4m in size. January and December offer the highest percentage of ground swell (53% and 46%, respectively) with mean swell heights around 1.3m-1.4m, providing more consistent and cleaner waves. However, wind conditions during these months are often unfavorable, with bad winds occurring 87%-90% of the time, making offshore winds rare. February also stands out with decent ground swell (52%) and slightly better wind probabilities (13% good winds). Spring and summer (April to September) see a steep decline in ground swell, dropping to as low as 3% in July and August, while wind swells become more prevalent but are generally weaker (0.7m-0.8m). Wind conditions worsen in summer, with bad winds exceeding 90% in most months. October marks a transition period, with ground swell increasing to 23% and swell size improving to 1.1m, though wind conditions remain poor. For experienced surfers, the winter months offer the most powerful and cleanest waves despite challenging winds, while summer is better suited for beginners due to smaller, less consistent conditions. Overall, the prime window for good surf at Rhossili Bay is late autumn to early winter, balancing swell size, consistency, and occasional favorable winds.

June at Rhossili Bay offers relatively small but consistent surf, with an average swell height of 0.7m and a decent period of 8.2s, providing rideable waves for intermediate to advanced surfers. The most dominant swell directions are WSW (accounting for the majority of days with waves over 1m) and SW, which bring the best size and consistency. However, wave heights are generally modest, with 0.5-1m being the most frequent range, and only occasional days exceeding 1.5m. Wind conditions are variable, with only 10% of days seeing ideal offshore or light cross-shore winds for surfing. The prevailing winds tend to come from the SW to WSW, which can be onshore and create choppy conditions, particularly when speeds exceed 20kph. Cleaner sessions are possible when winds shift WNW or NW, though these directions are less frequent. Overall, June is better suited for surfers comfortable with smaller, somewhat wind-affected waves, with occasional good days when swell, wind, and tide align.